behind the scenes 私下,暗地里/
  break in打断,插嘴
  break out突然出现,爆发
  break through (sth) 突破,冲破,扫除(途中的障碍)
  break up 弄破;(学校) 放假;(会议等)结束,散会
  hold your breath 屏着呼吸
  be out of breath 呼吸困难的,上气不接下气
  take sb’s breath away 使(某人)惊叹不已
  in brief 简言之
  bring about 导致,引起
  bring forward 提出,提议(某项法案、方案、计划等)
  build up 增加,增强,增多;增进
  in bulk 大量,大批
  burn down 烧毁
  burn out/burns itself out 熄灭;筋疲力尽
  burst into 突然开始…起来
  burst out laughing/crying/singing突然开始
  get down to business开始着手处理,开始做事
  but for 假如没有,要不是
  cannot but 不得不(做某事),禁不住(要做某事)
  by and large 大体上来看,总的来说